Steven Louis Antonakes - 03 Mar 2026 Form 4 Insider Report for Eastern Bankshares, Inc. (EBC)

Role: Executive VP
Signature: /s/ Kathleen R. Henry, by Power of Attorney
Issuer symbol: EBC
Transactions as of: 03 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 05 Mar 2026, 16:44:12 UTC
Previous filing: 03 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Antonakes Steven Louis	Executive VP	125 HIGH STREET, BOSTON	/s/ Kathleen R. Henry, by Power of Attorney	05 Mar 2026	0001825588

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	EBC	Common Stock	Options Exercise		+1,654	+2.2%	$0.000000^*	75,776	03 Mar 2026	Direct	F1, F7
transaction	EBC	Common Stock	Tax liability		-486	-0.64%	$19.45^*	75,290	03 Mar 2026	Direct	F7
holding	EBC	Common Stock						13,109	03 Mar 2026	By 401(k)	F2
holding	EBC	Common Stock						4,921	03 Mar 2026	By ESOP	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	EBC	Restricted Stock Units	Options Exercise		-1,654	-5%	$0.000000^*	31,509	03 Mar 2026	Common stock	1,654		Direct	F1, F5
holding	EBC	Restricted Stock Units						9,488	03 Mar 2026	Common stock	9,488		Direct	F1, F3
holding	EBC	Restricted Stock Units						1,814	03 Mar 2026	Common stock	1,814		Direct	F1, F4
holding	EBC	Restricted Stock Units						4,629	03 Mar 2026	Common stock	4,629		Direct	F1, F6

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Restricted stock units convert into common stock on a one-for-one basis.
F2	Reflects the amount of shares beneficially owned, including shares received due to automatic dividend reinvestment, as of the date of this report.
F3	On March 1, 2022, the reporting person was granted 47,438 restricted stock units that vest in five equal annual installments beginning March 1, 2023, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.
F4	On March 1, 2024, the reporting person was granted 5,439 restricted stock units that vest in three equal annual installments beginning March 1, 2025, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.
F5	On March 3, 2025, the reporting person was granted 33,163 restricted stock units of which 4,963 vest in three equal annual installments beginning March 3, 2026, after market close, and 28,200 vest after 3 years, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.
F6	On March 2, 2026, the reporting person was granted 4,629 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.
F7	The reporting person's immediately preceding Form 4, filed on March 3, 2026, inadvertently understated the amount of securities beneficially owned following reported transaction(s) by 920 common shares. The understatement was the net effect of two clerical errors. The first was an understatement of 20 shares in the disclosure of directly owned shares disposed of for tax withholding, resulting in an overstatement of 20 shares beneficially owned. To clarify, the Form 4 filed on March 3, 2026 should have disclosed that a total of 3,955 directly owned shares were disposed of for tax withholding (not 3,935 shares). The second clerical error was the omission of 940 directly held shares that had been previously been reported as acquired. The net of these transactions was an understatement of 920 common shares. The amount shown in this table corrects those two inadvertent clerical errors.